Batman clears his throat. 

"If you're quite finished whispering and giggling..." 

It seems it's time for a tour of the building! They all follow Batman through the "Museum of Justice" (AKA the trophy hall), the state-of-the-art gym, the well-stocked kitchen and dining area, and finally end up in the library. 

"...so, not that I'm complaining, but I'm curious why you have so many hardback books in here.  It's very...I would expect there to be a hardcopy archive somewhere, and probably several distributed caches of records - of various important things, and in various formats, come to think of it - hidden somewhere, but these seem very...prominent.  ...And who put all this empty space here?"

"Well, it would hardly look like a library without books, would it?" Green Arrow says with a grin. 

(If Diana extends her empathy, that grin has the feel of...some inside joke, perhaps?) 

"Well, I for one think this place is great. This couch? Heaven, baby."

Kid Flash is somehow* already sprawled comfortably on one of the couches with his feet propped up on a table, looking like he's been there for hours and could stay there for a few more. 

(*Superspeed. It's superspeed.) 

"Don't mind if I do." 

Robin joins him, flopping onto a plush armchair and sinking in with a sigh of happiness. 

"..."

Diana does him the credit of taking that comment seriously, and finally consciously processes the empathic impressions of tourists milling about in the observation deck.

"I think I see what you mean.  Though I hope that we're getting a bit more respect than you give the looky-loos up there."

She does, however, sit down, staff laid across her lap, despite the fundamental tension she's experiencing at being thrown out as tourist bait in her first group interaction.  That's...not remotely compassionate of the Leaguers.  (She's not aware of the way her Lantern flares at the thought, but it does.)  "Kid Flash is right about the furniture, though.  Where'd y'all get it from, anyone remember?  Might want to get some, when I have a permanent residence."

"...quick debrief to discuss the coincidence of four ice villains attacking on the same day," Batman is saying to some of the other Leaguers. They start moving towards a doorway marked JUSTICE LEAGUE MEMBERS ONLY. 

"We won't be long," Flash says cheerfully to the group of 'sidekicks'. "Just, uh, make yourselves at home, I guess?" 

"Interior design tips might have to wait for later," John says quietly to Diana, giving her a quick smile before following the others towards the door. 

Annnnd hold on a second.  No leaving just yet.  The other sidekicks are part of this; they shouldn't be shut out of the discussion after the action's done - they were trusted enough to fight, and not trusting them to report afterwards seems rather foolish.

"Excuse me, Batman, but if you are going to have a debriefing, wouldn't you need all the parties who were involved in the incident?  Or rather, incidents.  I can understand not including those not yet of the League who weren't attacked, I suppose, but leaving people who were there, out of the debrief itself seems like you might miss something.  Or has 'debrief' evolved to mean 'strategy meeting' in League parlance?"

"Their participation is unnecessary." 

"Ah, what Batman means to say is...the idea of this little get-together was for you kids to spend time with each other!" Aquaman puts in. "To, you know, hang out, make friends..." 

He gives a pointed glance to his own sidekick; Diana's empathy picks up on a definite sense that he thinks Aqualad could really do with some more friends his own age. 

...Diana stands up, staff flaring.

"...What, and pardon my language, the fuck, Batman?  Don't fucking lie to me.  To us.  You are burning the respect you've earned over these grueling years of service you've done for what?

"If there is a conspiracy targeting the League, and that's really the only thing that would merit everyone's attention - the people who could get hurt by it should know about it.  Not all the details, no, operational security concerns are real, but - enough to protect ourselves, because - either as targets ourselves of whatever hostile force, or as potential hostages held against a senior member's compliance, we're at risk!

"So there is either something so concerning in the information you have that you are too distracted by it to build a good cover for whatever meeting you want to hold, you have some fundamental lack of consideration of us junior Leaguers as people who can have opinions or make choices, or you think we're already involved somehow with whatever this is - and I'm not sure I want to know which!  Are you going to tell me, tell us literally anything or will I have to protect my home and family on my own recognizance against an entirely unknown threat!"

"We will tell you more when we know more. But not here, and not now." 

"That's it? You expect us to just accept that?" Speedy butts in. 

"We're not just gonna sit quietly and wait for you to decide we're worthy of being told what's going on!" 

Diana paces the floor, staff tik-ing as she walks and thinks.

"They do, and - honestly, I can see the reasons they'd take that position, that we don't yet need to know because nobody knows, but I think they're being stupid about how they did it in a way that still leaves me rather concerned.  But.  Aquaman was being sincere about this being a get-together for us.  And when you look at the nebulous conspiracy of villains as a distraction from - forging a collection of sidekicks into the next generation of the Justice League...

"It makes more sense to let the meet-and-greet run, than let it get broken up before it starts.

"Not that I think that it was necessarily a good idea to continue keeping the veneer up after everything that happened, but...I can't say there's no point, just that it got buried under - well, this, the concerns about us not being trusted, and that was absolutely exacerbated by Batman's control issues.  No offense, sir, but - you do have them, with the way you treat Gotham especially, and your...the way that after a zillion ways of making things happen fall into the League's laps, you're still only human.  You don't trust anyone or anything, and that's a good trait for covert operations, but a bad trait for leaders, who need to be able to delegate their plans and rely on people and organizations, rather than micromanage everything everywhere, keeping it all siloed off.  You're leading this organization, sir.  We all know that.  It's not the role where you have comparative advantage, though, so - I really need to ask, why are you doing it?"